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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Statement of Comprehensive Income [Abstract] |  |  |  |
Net income | $ 150,277 | $ 109,832 | $ 308,466 | $ 236,086
Other comprehensive income (loss): |  |  |  |
Unrealized gains (losses) on investments | 3,164 | 42 | 6,102 | (4,085)
Unrealized gains (losses) on cash flow hedges | (24,013) | 10,014 | (38,130) | 30,304
Total unrealized gains (losses) | (20,849) | 10,056 | (32,028) | 26,219
Income tax benefit (expense) | 5,093 | (2,441) | 7,826 | (6,343)
Other comprehensive income (loss), net of tax benefit (expense) | (15,756) | 7,615 | (24,202) | 19,876
Total comprehensive income | $ 134,521 | $ 117,447 | $ 284,264 | $ 255,962

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